Fig. 3 in Review paper Stimulation of Plant Growth through Interactions of Bacteria and Protozoa: Testing the Auxiliary Microbial Loop Hypothesis

Fig. 3. Difference in growth responses of 16 cultivars of rice (Oryza sativa L.) grown in autoclaved soil and with a diverse soil bacterial filtrate reinoculated into the farmland soil in presence (black bars) and absence (white bars) of Acanthamoeba sp. Shoot dry weight (a), total root length (b), number of laterals at seminal root (c), and total nitrogen uptake (d). Vertical error bars represent standard deviation (n = 4–9). The symbols * and ** indicate a significant difference at P <0.05 and 0.01 by one way ANOVA, respectively. Data from Somasundaram et al. (2008).